Error in saving csv to MySQL table due to NULL values - mysql

Question

I have the data saved in my csv excel. The data have some null value in row and column. I want to save this data into my database in MySQL. But null value is causing problem in saving the data to MySQL. This is the query for creating the table -
create table student (
Std_ID int,
Roll_NO int,
First_Name varchar(10) NOT NULL,
Last_Name varchar(10),
Class int,
constraint test_student primary key (Std_ID)
);
...and it ran successfully. Now I want to save my data from csv to this table using the query -
load data infile 'C:\\ProgramData\\MySQL\\MySQL Server 8.0\\Uploads\\new.csv' into table student fields terminated by ',' lines terminated by '\n' ignore 1 lines;
...and is giving me the error msg -
ERROR 1366 (HY000): Incorrect integer value: '' for column 'XXX' at row X.
For the reference you can use this data.
The same can be find below.

Answer 1

LOAD DATA INFILE 'C:\\ProgramData\\MySQL\\MySQL Server 8.0\\Uploads\\new.csv'
INTO TABLE student
FIELDS TERMINATED BY ','
LINES TERMINATED by '\n'
IGNORE 1 LINES
-- specify columns, use variables for the columns where incorrect value may occur
(Std_ID, #Roll_NO, First_Name, Last_Name, #Class)
-- use preprocessing, replace empty string with NULL but save any other value
SET Roll_NO = NULLIF(#Roll_NO, ''),
Class = NULLIF(#Class, '');
If some column in CSV is empty string then NULL value will be inserted into according column of the table.
Std_ID is not preprocessed because it is defined as PRIMARY KEY, and it cannot be NULL.
UPDATE
OP provides source file sample. Viewing it in HEX mode shows that the file is Windows-style text file, and hence the lines terminator is '\r\n'. After according edition the file is imported successfuly.